Onyx Security Raises $113M Series B to Control Advanced AI, Quadrupling Revenue since Stealth Launch Four Months Ago
Funding led by Bessemer Venture Partners comes as increasingly sophisticated AI requires more oversight and control
Onyx Security, the AI control company, announced a $113 million Series B funding round led by Bessemer Venture Partners, with participation from Cyberstarts, TCV, Conviction, FirstMark, Vintage, QuantumLight and G Squared. This brings the company’s total funding to $153M since its founding exactly two years ago.
Since coming out of stealth four months ago, Onyx has grown revenue fourfold, and in June, Anthropic announced its integration with Onyx to secure enterprise AI adoption. This comes on the heels of dozens of other AI providers being integrated with the Onyx platform.
In the past few months Onyx has seen the advent of a new type of models, such as Mythos and Fable, possessing such advanced capabilities they were initially deemed too dangerous for public release. With the advancement in model intelligence, enterprise AI adoption is entering a new phase of sophisticated AI agents that are incredibly capable, yet hard to control. Employees are giving these agents access to critical systems and tasking them to automate increasingly complex jobs. This presents a fundamental new risk: agents are empowered but not accountable for their actions.
